2026 Specialized Roubaix SL8 Pro vs 2025 Specialized Tarmac SL8 LTD
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Specialized Tarmac SL8 LTD
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- −3 mm
- Shorter frame reach
- Wheelbase
- −36 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −13 mm
- Shorter: livelier
The two frames
Only the Specialized Roubaix SL8 Pro is drawn. The Specialized Tarmac SL8 LTD numbers we have for size 58 are missing the stack.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Pro 61 | Specialized Tarmac SL8 LTD 58 | Difference |
|---|---|---|---|
| Reach | 403 | 400mm | −3 mm |
| Stack | 665 | not listed | |
| Head tube angle | 73.5 | 73.5° | ±0.0° |
| Seat tube angle | 73.5 | 73.5° | ±0.0° |
| Effective top tube | 600 | 577mm | −23 mm |
| Chainstay length | 423 | 410mm | −13 mm |
| Wheelbase | 1042 | 1006mm | −36 mm |
| BB drop | 78 | 72mm | −6 mm |
| BB height | 271 | 268mm | −3 mm |
| Standover | 847 | 808mm | −39 mm |
| Seat tube length | 545 | 515mm | −30 mm |
| Fork length | 375 | 370mm | −5 mm |
| Head tube length | 202 | 184mm | −18 mm |
Differences are the Specialized Tarmac SL8 LTD minus the Specialized Roubaix SL8 Pro. Full charts: 2026 Specialized Roubaix SL8 Pro, 2025 Specialized Tarmac SL8 LTD.
Where each sits in its class
Specialized Roubaix SL8 ProSpecialized Tarmac SL8 LTD
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Roubaix SL8 ProSL8 Pro | Specialized Tarmac SL8 LTDS-Works LTD |
|---|---|---|
| Frame | Specialized Roubaix | Specialized S-Works Tarmac SL8 FACT |
| Fork | Specialized Future Shock 3.3 | not listed |
| Shifter | SRAM Force AXS E1 HRD | SRAM RED AXS |
| Derailleur | SRAM Force AXS E1, SRAM Force AXS | SRAM Red AXS |
| Cassette | SRAM Force XG-1270 E1 | SRAM RED XG-1290 |
| Chain | SRAM Force E1 | SRAM RED |
| Crankset | SRAM Force E1 Power Meter | SRAM RED AXS Power Meter |
| Bottom bracket | SRAM DUB | SRAM DUB |
| Wheelset | Roval Rapide CL | Roval Rapide CLX II |
| Tire | Specialized Mondo TLR Endurance | Specialized S-Works Turbo Rapidair 2Br |
| Brake | SRAM Force AXS E1, SRAM Force E1 | SRAM Red AXS |
| Handlebar | Roval Alpinist | Roval Rapide Cockpit |
| Stem | Specialized Pro SL | Roval Rapide Cockpit |
| Grips | Supacaz Super Sticky Kush | not listed |
| Seatpost | Specialized S-Works Pave | not listed |
| Saddle | Specialized Power Pro Mirror | Specialized S-Works Power |
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